Fireproof structure.



No, 652,05I. Patented June I9, |900.

I J. STREIFLEH. f Y

FIREPRODF STRUCTURE.

(Application led Apr. 18, 1900.)'

A TTG/WE YS Jenn STEEIFLER, or NEW .YoRK,

li--mspnoor STRUCTURE.

SYPECIFICATON forming part of Letters Patent No.

Application iiled April 18,

. To all whom t may concern:

Be it known that I, JOHN STREIFLER, a citizen of the United States,

and a resident of the city of New York, borough of Manhattan,

1n the county and State of New York, have invented a new and useful Improvement in Fireproof Structures, of which the following and exact description.

lhe purpose of the invention isto provide a perfect reproof construction for dumbwaiters, elevator-shafts and partitions, and to so utilize metal tongues that they will elcctually hold the parts of the structure together at the joints and between the joints, which tongues are completely concealed Within'the structure.

Another to provide a means whereby the abutting ends of slabs or blocks used in the construction of small dumb-waiter shafts `may be quickly and perof a fireproof structure constructed in accordance with my invention. Fig. 2 is a perspective View of a few blocks placed together 1n accordance with my invention.

ing out the.invention. Fig. 5 is a perspective view of a portion of'a smalldumb-waiter shaft, illustrating the application of the improvements thereto; and Fig. 6 is a horizontal section through. a corner portion of the shaft shown in Fig. 5, but drawn on an cn- ]arged scale. f

. beyond the surfaces plied usually for about half their depth or slotted.

652,051, dated June 19, 1900.

A represents blocks, which may such as metal, cement,

asbestos, ora composition of material adapted to withstand the effects or the action of ire. The blocks A are usually made rectangular, as shown, and each block is provided at the top and at the bottom with a longitudinal groove l0, centrally located, and these grooves are usually and preferably coneaved or semicircnlar in cross-section. Grooves lO maybe and preferably are also made in the end surfaces of the block-s. Each block is provided with a longitudinal slot 11 in the central portion of its top and bottom groove 10, and these sions extend to the endportions of the blocks. The ends o the blocks are also'preferably The slots 1l are adapted to receive plates or tongues B, which plates or tongues extend to which they are aptransverse dimensions. Any desired numare received in faces of the blocks of the nextfrow, and the plates or tongues B are so extend across into the blocks of the next upper row at points between the ends of said blocks. Prior to placing the blocks one up the other, but B have been placed in the upper surfaces of the lower blocks, the grooves 10 are filled with cement or other adhesive material, and

cement is likewise placed in proper quanti- IOO ties upon the upper edges of the lower blocks at each side of the slot 10. Cement is then placed in like manner upon the bottom edges of' the blocks to be placed upon the lower blocks to form the next row, whereupon the made up of a series of single blocks placed Patentone upon the other, and single tie-plates or tongues B are employed, it is advisable to provide means for securing-'the corner portions of the structure or tying these portions together, and this is accomplished by cutting transverse grooves 13 in' the inner faces of the blocks at the top and bottom near each end, as shownl in Figs. 5 and 6, and placing angle-irons 14 in the grooves 10, thusconnected at the corners of the-structure, it being understood that the angleirons Mare embedded in cement or adhesive material of any suitable description.

Having thus described Imy invention, I claim-as new and desire to securebyL-etters 1. In fireproof structures, a block having one or more of its edges grooved, and slots When the shaft is produced longitudinally in the grooves, for the purpose eet forth.

2. In. reproof structures, av block having its edges longitudinally grooved and the bottom portions of the grooves provided with slots, and tieplatesortongues fitted into the said slots, the tie-plates or tongues extending beyond the edges in which they'are re' ceived.

3. In Iireproof structures, the combination, with a block having a longitudinal groove in its upper and in its lower edge or face, extendingvroin end to end, and also provided with longitudinal slots extending the length of the grooves, of tie-plates or tongues adapted to outer the said slots and extend beyond the edges in which the slots and grooves are made, as specified.

l.. In aiireproof structure, a shaft constructed of series of blocks having longtudi- N Witnesses:

J. FRED. ACKR,

JNO. M. RITTER. 

